Australia asks Turkey to extradite top Islamic State terror suspect

Australia is seeking the extradition of its most wanted Islamic State terror suspect who was thought to be dead but has been caught alive by Turkey, the government today said.

The announcement followed a New York Times report that so-called Islamic State group operative Neil Prakash had been caught by Turkish forces several weeks ago as he tried to enter their country from Syria.

"An individual we believe to be Neil Prakash has been arrested and detained in Turkey," a government spokesperson said in a statement.

"Prakash is subject to a formal extradition request from Australia."

Prakash was a senior recruiter for Islamic State and has been linked to terror plots to kill Australians.

In May Prakash was reported dead by Canberra on advice from Washington that he had been killed in a US airstrike in northern Iraq.

However, the Times said he was only wounded, not killed, in Mosul on April 29.

He has been linked to a failed Melbourne plot to behead a police officer in April last year, as well as to an 18-year-old who was killed after stabbing two police officers in Melbourne in 2014.

Prime Minister Malcolm Turnbull has called Prakash the senior Australian operative in IS.

Reported to be of Indian, Fijian and Cambodian background, Prakash used the internet "to promote the evil ideology" of the jihadist group "and recruit Australian men, women and children, many of whom are either still in the conflict zone or dead.